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#1
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'72 Duster rearend
I recently took ownership of a '72 duster with a six cylinder auto and was wondering, how do I know which diff it has (8.25 or 8.75) and how do you tell at a glace?
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#2
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like this
7 1/4 has a stop sign shaped cover, with ten bolt holes. 8 1/4 has a round cover with 10 bolt holes(I don't think these came on duster's till 73) 8 3/4 has no cover at all, as the carrier comes out the front. No tin pan cover, or diff pan/gasket. |
#3
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a 7 1/4 actually has 9 bolts. the 8 1/4 does have 10 bolts, though.
if the car was a 6 cylinder from the factory, it should have a 7 1/4. they did stop using the 8 3/4 on a-bodies after 1972 |
#4
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9 bolts???
I thought they're both 10. That seemed to be the concensus on a previous thread, that's why the shape of the cover is necessary to determine which diff is which. |
#5
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im pretty sure its 9 bolts on the 7.25 and 10 bolts on the 8.25. of course, in a situation i would go look at one of my cars or my shop manual. of course, all of that is at my shop.
but i do remember the 7.25 not being round, and the 8.25 definately being round. |
#6
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7.25=9 bolts,8.25=10 bolts 8.75=0 bolts!!!
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#7
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Quote:
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#8
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Thanks for all your help!
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